<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en">
<head>
	<meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />
	<title>test this</title>
	<script type="text/javascript">
		var numb = 1;
		var handler = window.setInterval(function(){
			numb++;
			alert(numb);
			if(numb > 5){
				window.clearInterval(handler);
				handler = null;
			}
		}, 2000);
	</script>
</head>
<body>
	
</body>
</html>